Getting it into your agent
One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.
npx skills add intellectronica/agent-skills --skill beautiful-mermaidgit clone --depth 1 https://github.com/intellectronica/agent-skillsWrote this? Show the measurements
A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.
[](https://agentmods.dev/skills/intellectronica/agent-skills/beautiful-mermaid)<a href="https://agentmods.dev/skills/intellectronica/agent-skills/beautiful-mermaid"><img src="https://agentmods.dev/badge/skills/intellectronica/agent-skills/beautiful-mermaid/github.svg" alt="Measured on agentmods" height="20"></a>Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.
<a href="https://agentmods.dev/skills/intellectronica/agent-skills/beautiful-mermaid"><img src="https://agentmods.dev/badge/skills/intellectronica/agent-skills/beautiful-mermaid.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- Socket pass
- Snyk pass
What it costs to keep this loaded
Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.
| Model | Per session | Once invoked |
|---|---|---|
| Fable 5.1 | $0.00028 | $0.01184 |
| Opus 5 | $0.00014 | $0.00592 |
| Sonnet 5 | $0.00006 | $0.00237 |
| Haiku 4.5 | $0.00003 | $0.00118 |
Grade A, and why
beautiful-mermaid scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 12d ago.
A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.
Nothing flagged
None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.
How it starts
The opening of the file, as written. The whole thing — 172 lines — stays where its author put it; the contents beside it link to each section on GitHub.
Beautiful Mermaid Diagram Rendering
Render Mermaid diagrams as SVG and PNG images using the Beautiful Mermaid library.
Dependencies
This skill requires the agent-browser skill for PNG rendering. Load it before proceeding with PNG capture.
Supported Diagram Types
- Flowchart - Process flows, decision trees, CI/CD pipelines
- Sequence - API calls, OAuth flows, database transactions
- State - State machines, connection lifecycles
- Class - UML class diagrams, design patterns
- Entity-Relationship - Database schemas, data models
Available Themes
Default, Dracula, Solarized, Zinc Dark, Tokyo Night, Tokyo Night Storm, Tokyo Night Light, Catppuccin Latte, Nord, Nord Light, GitHub Dark, GitHub Light, One Dark.
If no theme is specified, use default.
Common Syntax Patterns
Flowchart Edge Labels
Use pipe syntax for edge labels:
A -->|label| B
A ---|label| B
Avoid space-dash syntax which can cause incomplete renders:
A -- label --> B # May cause issues
Node Labels with Special Characters
Wrap labels containing special characters in quotes:
A["Label with (parens)"]
B["Label with / slash"]
Workflow
Step 1: Generate or Validate Mermaid Code
If the user provides a description rather than code, generate valid Mermaid syntax. Consult references/mermaid-syntax.md for full syntax details.
Step 2: Render SVG
Run the rendering script to produce an SVG file:
bun run scripts/render.ts --code "graph TD; A-->B" --output diagram --theme default
Or from a file:
bun run scripts/render.ts --input diagram.mmd --output diagram --theme tokyo-night
Alternative runtimes:
npx tsx scripts/render.ts --code "..." --output diagram
deno run --allow-read --allow-write --allow-net scripts/render.ts --code "..." --output diagram
This produces <output>.svg in the current working directory.
Step 3: Create HTML Wrapper
Run the HTML wrapper script to prepare for screenshot:
What ships with it
3 files beside SKILL.md in the same directory: the scripts, references and assets a skill reads on demand. Not counted in the per-session cost; read them before you install if any of them is executable.
What this file has done since we first saw it
Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.
- 12d ago First seen · 172 lines · 28 tokens per session scan A 2ea488822ccd
beautiful-mermaid is a skill published in the GitHub repository intellectronica/agent-skills (292 stars, last pushed 4mo ago), licensed CC0-1.0. It adds 28 tokens to every session and 1,184 once invoked, about $0.0001 per session on Opus 5. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.
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